package chapter.sixth.item34;

public enum BasicOperation implements Operation {
	PLUS("+"){
		public double apply(double x,double y){return x+y;}
	},
	MINUS("-"){
		public double apply(double x,double y){return x-y;}
	},
	TIMES("*"){
		public double apply(double x,double y){return x*y;}
	},
	DIVIDE("/"){
		public double apply(double x,double y){return x/y;}
	};
	
	private final String symbol;
	BasicOperation(String symbol){
		this.symbol = symbol;
	}
	@Override
	public String toString() {
		return symbol;
	}

}
